Machine for sawing logs.



No. 817,496. PATENTED APR. 10, 1906.

. D. A. LUNT.

MACHINE FOR SAWING LOGS.

APPLICATION FILED JULY 7. 1904.

3 SHEETSSHEET 1 D. A. LUNT.

MACHINE FOR SAWING LOGS.

No. 817,496. PATENTIZED APB.10, 1906.

APPLICATION FILED JULY 7.1904.

3 SHEETS- SHEET 2.

minesses:

@M 55am No. 817,496. BATENTED APR. 10, 1906.

D. A. LUNT.

MACHINE FOR SAWING LOGS.

APPLIGATION FILED JULY7.1Q04.

3 SHEETS-SHEET 3.

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rurn srA rEs PATENT orrion.

DANIEL A. LUNT, OF NEWBURYPORT, MASSACHUSETTS, ASSIGNOR TO LUNT, MOSS 8:(10., OF BOSTON, MASSACHUSETTS, A FIRM.

MACHINE FOR SAWING LOGS- Specification of Letters Patent.

Patented April 10, 1906.

Application filed July 7, 1904. Serial No. 215,655.

the following is a specification.

This invention relates to machines for sawing logs, and particularly tothat class of machines in which a log on carriers is fed at right anglesto the saw.

It consists in certain novel features of construction and arrangement ofparts which will be readily understood by reference to the descriptionof the drawings and to-the claim to be hereinafter given.

Of the drawings, Figure 1 represents a plan view of a machine embodyingthe features of this invention. Fig. 2 represents a longitudinalsectional elevation of the same. Fig. 3 represents a side elevation ofthe adjusting mechanism for said saw, and Fig. 4 represents an invertedplan of the same.

Similar characters designate like parts throughout the several figuresof the drawin s.

in the drawings, 10 represents a suitable framework having securedthereon bearings 11, in which is mounted a transverse shaft 12, to oneend of which a driving-pulley 13 is secured, while the other end isprovided with a pulley 14. Pivoted at 15 to the frame 10 is a frame 16,the outer or free end of which is provided with a laterally-projectingsupport 17, secured thereto, said support having mounted therein theboxes 18, which are adjustable lengthwise of the frame 16 by means ofset-screws 19, mounted in ears 20, projecting from said support 17.

The boxes 18 are clamped in adjusted position by means of theclamping-bolts 21, extending through slots 22 in the support 17. In theboxes 18 is mounted an arbor 23, to the outer end of which, between thearms of the frame 16, is secured a circular saw 24, which is driven bymeans of the pulley 25, secured to said arbor and connected by a belt 26with the pulley 14.

The frame 1.0 has secured thereto a vertical support 27, to the upperend of which is pivoted at 28 a lever 29, one end of which is connectedby a link 30 to the frame 16, while the opposite end is provided with aweight 31, adapted to be adjusted lengthwise of said lever 29 tocounterbalance the weight of the frame 16 and its saw-operatingmechanism.

By the use of the counterbalance-weight 31 the frame 16 and the sawingdevices thereon may be made very strong and heavy enough for theroughest work without bringing any additional strain upon the operator,for however heavy these parts may be made the weight of thecounterbalance 31 will slightly exceed the weight of those parts, so

that the frame 16 may be easily operated by the l1a11dle'32.

The handle 32 is pivoted at to the support 27 and is provided with anarm 34, which is connected by a link 35 to the pivoted frame 16. It isevident that the operator by manipulating the handle 32 may raise andlower the frame 16 at will. ard 27 is secured. a toothed are 36, withwhich a spring-actuated locking-bolt 37, secured to the handle 32,cooperates, said bolt being provided with a releasing-handle 38. Bymeans of this handle 32 the operator may move the swinging frame 16 intoany position and lock the same in adjusted. position, as desired.

On the shaft 12 is mounted a bevel-gear 40, meshing with a bevel-gear 41on a shaft 42, mounted in bearings 43 on the frame 10. The shaft 42 isprovided with a spur-gear 44, meshing with another gear on a parallelshaft 46, mounted in the bearings 47 47. The gears 44 45 are movedcontinuously when the machine is in operation by means of thedriving-pulley 13. On the shafts 42 46 are slidably mounted clutchmembers 48 49, each provided with a gear 50 51, with both of which agear 52 meshes. The gears 50 51 remain continually in mesh with saidgear 52. A lever 54, pivoted to the frame 10 at 55 and operated by ahandle 56, connected thereto by a link 57, is adapted to operate saidslidable clutch members 48 49 to move either one or the other intoengagement with the continuously-moving gears 44 45, so that motion maybe derived therefrom to rotate the gear 52 in one direction or theother, as desired. The gear 52 is secured to a shaft 58, mounted inbearings 59 on the frame 10, and is connected by a universal joint 60with a shaft 61, the opposite end of which is con To the standnected byanother universal joint 62 on the log-feeding members 63, all of awell-known construction.

In the operation of this apparatus the log being placed in position uponthe carrier 63 the operator manipulates the handle 56 to cause amovement of the gear 52 and shafts 58 61 to drive the carrier 63 in adirection to move the log into the position in which it is desired to becut, when the operator will manipulate the handle 56 to remove theclutches O 51 from engagement and stop further movement of the carriers63. During the movement of the log beneath the saw 24 the swinging frame16 is locked in raised position by means of the bolt 37. hen, however,the log has reached a position in which it is desired to be cut, theoperator releases the bolt 37 and by means of the handle 32 moves thesaw into contact with the log, said saw being driven by the pulley 25 ata high speed. When the desired section from the log has been sawed, theoperator will raise the saw again by means of the handle 32 and lock itin raised position until a further movement of the log beneath the samebrings it into position for another cutting.

By making the weight 31 of a weight eX- ceeding the combined weight ofthe frame 16 and its sawing device it is evident that the saw will beautomatically removed from the log as soon as power is removed from thehandle 32.

This apparatus for sawing logs makes a very simple device, and byproviding a counterbalance which balances the weight of the swingingframe and the sawoperating mechanisms much strain is removed from theoperator. Moreover, the ability to readily move the saw out of operationand lock it in adjusted position without excessive strain upon theoperator is another great advantage of this apparatus. A furtheradvantage to be derived from this invention is the operation of thelog-feeding device and. a circular sawing device from a single drivingmechanism, whereby both may be controlled readily by one operatorwithout moving from operating position.

It is believed that with the foregoing description the operation of theinvention will be thoroughly understood without further description.

Having thus described my invention, I claim In a machine for sawinglogs, a stationary frame, a transversely-disposed driving-shaft vcarried by said frame, a pivoted frame mounted on said. stationaryframe, a circular saw mounted on said pivoted frame, means for impartingmotion to said saw from said driving-shaft, a beveled gear mounted onsaid driving-shaft, two parallel shafts disposed longitudinally on saidstationary frame, said last-named shaft being provided With intermeshinggears and each with a loose gear and a clutch coacting therewith, abeveled gear carried by one of said shafts and meshing with the beveledgear on the driving-shaft, a third shaft longitudinally disposed on saidframe, a gear-wheel carried on said third shaft and meshing with thesaid two looselymounted gear -wheels, a pivoted lever connected to bothsaid clutches and adapted when moved to engage the clutches alternatelywith the loosely-mounted gear-wheels, and means connected to said thirdshaft for moving a log beneath said saw.

Signed by me, at Boston, Massachusetts, this 24th day of June, 1904.

DANIEL A. LUNT. Witnesses:

WALTER E. LOMBARD, EDNA O. CLEVELAND.

